Finding the Fourth Proportional to 309,776.81, 427,499.37 and 173,820.82

Step by Step Solution

1. Step 1: Write the proportion equation
   309,776.81 : 427,499.37 = 173,820.82 : x
2. Step 2: Convert to fraction form
   309,776.81/427,499.37 = 173,820.82/x
3. Step 3: Cross multiply
   309,776.81x = 427,499.37 × 173,820.82
4. Step 4: Simplify right side
   309,776.81x = 74,308,289,974.14
5. Step 5: Solve for x
   x = 74,308,289,974.14/309,776.81
6. Step 6: Final answer
   x = 239,876.86